Vehicle and license plate association method and device and electronic system

Abstract

The invention provides a vehicle and license plate association method and device and an electronic system. The method comprises the following steps: performing vehicle feature detection and license plate feature detection on a to-be-detected image to obtain a vehicle detection frame set and a license plate association frame set of the to-be-detected image, wherein the vehicle detection frame set comprises at least one vehicle detection frame, and wherein the license plate association box set comprises at least one group of license plate detection boxes and candidate vehicle frames corresponding to the license plate detection boxes; calculating the matching degree of the candidate vehicle frames in the license plate association frame set and the vehicle detection frames in the vehicle detection frame set; and determining a vehicle detection frame associated with the license plate detection frame in the license plate association frame group set according to the calculated matching degreeof the candidate vehicle frame and the vehicle detection frame. According to the invention, the matching degree of the candidate vehicle frame and the vehicle detection frame is calculated, the problems that the detection frame does not include the license plate and the same license plate exists in multiple detection frames are solved, and the stability and accuracy of association of the vehicleand the license plate can be improved.

Description

technical field [0001] The invention relates to the technical field of target detection, in particular to a method, device and electronic system for associating a vehicle with a license plate. Background technique [0002] Object detection is a fundamental component of computer vision-based artificial intelligence applications. In recent years, with the rapid development of deep learning and computer hardware technology, object detection technology has made breakthroughs in both accuracy and computing speed, and vehicle detection and license plate detection technologies have therefore been widely used. When performing vehicle detection and license plate detection, it is not only necessary to accurately detect vehicles and license plates, but also to determine the corresponding relationship between vehicles and license plates, so as to lay a solid foundation for cross-camera tracking. For example, in a security scene, in continuous video shots, only a few frames may be able ...

AI Technical Summary

Problems solved by technology

[0003] In the existing vehicle and license plate association technology, the detection of the vehicle and the license plate is carried out first, and then the association is performed using post-processing logic (such as IoU (Intersection-over-Union, Intersection-over-Union)), and the following problems exist: 1. Vehicle detection The frame may be too small, and the small detection frame may not include the license plate, and the license plate and the vehicle cannot be associated; 2. Vehicles overlap with each other, which will cause different vehicle detection frames to overlap each other. Such a license plate may exist in the In multiple vehicle detection frames, one vehicle detection frame may also include multiple license plates; in this case, the corresponding relationship between the license plate and the vehicle detection frame cannot be determined, resulting in poor stability and low accuracy of the association between the vehicle and the license plate

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